Fuel Supply Line: Service and Repair
Fuel Lines
Front Fuel Lines, Aft-of-Axle Fuel Tank
NOTE: Vehicle body removed from art for clarity.
Center Fuel Lines, Aft-of-Axle Fuel Tank
NOTE: Vehicle body removed from art for clarity.
Rear Fuel Lines, Aft-of-Axle Fuel Tank
NOTE: Vehicle body removed from art for clarity.
Fuel Lines, Midship Fuel Tank
NOTE: Vehicle body removed from art for clarity.
Removal and Installation
All fuel lines
1. With the vehicle in NEUTRAL, position it on a hoist.
2. Release the fuel system pressure.
Front fuel lines
3. Disconnect the front fuel supply tube-to-fuel rail quick connect coupling.
4. Disconnect the front fuel vapor tube-to-Evaporative Emission (EVAP) canister purge valve quick connect coupling.
5. Detach the Heated Oxygen Sensor (HO2S) electrical connector retainer and the wiring harness retainer from the fuel supply tube and fuel vapor tube bracket.
6. Remove the front fuel supply tube and front fuel vapor tube bracket bolt from the transmission bellhousing.
- To install, tighten to 48 Nm (35 lb-ft).
7. Remove the 3 LH catalytic converter heat shield bolts and position the heat shield aside.
8. Detach the 2 front fuel supply tube and front fuel vapor tube position retainers from the frame.
9. Remove the front fuel supply tube and front fuel vapor tube assembly.
Midship fuel tank, rear fuel lines
10. Remove the fuel tank. For additional information, refer to Fuel Tank- Midship Fuel Tank - Midship.
11. Disconnect the 2 rear brake tube fitting-to-rear brake hose connections.
- Calculate the correct torque wrench setting for the following torque.
- To install, tighten to 18 Nm (159 lb-in).
12. Detach the 3 brake tube position retainers from the frame rail.
13. Disconnect the 2 rear brake tube fitting-to-front brake tube fitting connections.
- Calculate the correct torque wrench setting for the following torque.
- To install, tighten to 18 Nm (159 lb-in).
14. Disconnect the rear fuel supply tube-to-front fuel supply tube quick connect coupling.
15. Disconnect the rear fuel vapor tube-to-front fuel vapor tube quick connect coupling.
16. Remove the 2 position retainer nuts and the rear fuel supply tube, rear vapor tube and brake tube assembly from the vehicle.
- To install, tighten to 9 Nm (80 lb-in).
Aft of axle tank, center fuel lines
17. Disconnect the center brake tube fitting-to-front brake tube fitting connection.
- Calculate the correct torque wrench setting for the following torque.
- To install, tighten to 18 Nm (159 lb-in).
18. Disconnect the center fuel supply tube-to-front fuel supply tube quick connect coupling.
19. Disconnect the front fuel vapor tube-to-center fuel vapor tube quick connect coupling.
20. Disconnect the center brake tube fitting-to-rear brake hose connection.
- Calculate the correct torque wrench setting for the following torque.
- To install, tighten to 18 Nm (159 lb-in).
21. Disconnect the rear fuel vapor hose-to-center fuel vapor tube quick connect coupling.
22. Disconnect the rear fuel supply hose-to-center fuel supply tube quick connect coupling.
23. NOTE: Position retainer quantities will vary by wheelbase.
Remove the center fuel supply tube, fuel vapor tube and brake fluid tube assembly position retainer nuts.
- To install, tighten to 9 Nm (80 lb-in).
24. Detach the pushpin type position retainer and remove the center fuel supply tube, fuel vapor tube and brake fluid tube assembly.
Aft of axle tank, rear fuel lines
25. Remove the fuel tank. For additional information, refer to Fuel Tank- Aft-of-Axle Fuel Tank - Aft-of-Axle.
26. Disconnect the center brake tube fitting-to-rear brake hose connection.
- To install, tighten to 18 Nm (159 lb-in).
27. Disconnect the rear fuel vapor hose-to-center fuel vapor tube quick connect coupling.
28. Disconnect the rear fuel supply hose-to-center fuel supply tube quick connect coupling.
29. Detach the 2 position retainers and remove the rear fuel supply and fuel vapor hose assembly.
All fuel lines
30. To install, reverse the removal procedure.
31. If necessary, bleed the brake system.